Thailand is currently the country waste water into water sources. Especially wastewater from households, which often have arsenic in water as a component. Therefore, to use the material to absorb and absorb arsenic in the wastewater by the luxury of the shells easy to find in nature by grinding and baking temperature is taken with a 300 degree Celsius. Then apply to chemical stimulation with fosof acid, 60% by weight foe kakhem concentrate and be tested with materials to absorb to soak in water for a period of 5 days, measured quantity of arsenic every 24 hours from the experiment found that the dut lining material can absorb arsenic with arsenic in a sample volume of wastewater decreased from 30 ppb ppb averaged 15.
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